/* ============================================================
   Component: header / nav (BEM)
   Solid teal bar over the light body — the top of the brand frame.
   ============================================================ */

.header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--brand-teal);
  box-shadow: 0 2px 12px -4px rgba(2, 79, 70, 0.4);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-lg);
  padding-block: var(--space-md);
}

.nav__logo {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  font-family: var(--font-heading);
  font-size: var(--text-xl);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wide);
  color: var(--on-teal);
}
.nav__logo:hover { color: #fff; }
.nav__logo-img { height: 2.25rem; width: auto; }   /* used once the logo image is wired in */

.nav__menu {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  list-style: none;
}

.nav__link {
  display: inline-block;
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-full);
  color: var(--on-teal-muted);
}
.nav__link:hover { color: #fff; background: rgba(244, 244, 244, 0.14); }
.nav__link--active { color: #fff; background: rgba(244, 244, 244, 0.20); }

/* --- Mobile toggle (hidden on desktop) --- */
.nav__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: var(--space-sm);
  background: none;
  border: none;
  cursor: pointer;
}
.nav__toggle-bar {
  width: 24px;
  height: 2px;
  background: var(--on-teal);
  border-radius: var(--radius-full);
  transition: transform var(--transition), opacity var(--transition);
}

@media (max-width: 720px) {
  .nav__toggle { display: flex; }

  .nav__menu {
    position: fixed;
    inset: 64px 0 auto 0;
    flex-direction: column;
    align-items: stretch;
    gap: var(--space-xs);
    padding: var(--space-lg);
    background: var(--brand-teal-deep);
    box-shadow: var(--shadow-lg);
    transform: translateY(-120%);
    transition: transform var(--transition);
  }
  .nav__menu--open { transform: translateY(0); }
  .nav__link { text-align: center; }

  /* Hamburger → X when open */
  .nav__toggle[aria-expanded="true"] .nav__toggle-bar:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .nav__toggle[aria-expanded="true"] .nav__toggle-bar:nth-child(2) { opacity: 0; }
  .nav__toggle[aria-expanded="true"] .nav__toggle-bar:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
}